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http://dx.doi.org/10.12791/KSBEC.2022.31.2.104

Effects of LED Light Quality on the Growth and Leaf Color of Orostachys japonica and O. boehmeri  

Lee, Jae Hwan (Department of Environmental Horticulture, Graduate School of Sahmyook University)
Soh, Soon Yil (Natural Science Research Institute, Sahmyook University)
Kim, Hyeon Jin (Department of Environmental Horticulture, Graduate School of Sahmyook University)
Nam, Sang Yong (Department of Environmental Horticulture, Graduate School of Sahmyook University)
Publication Information
Journal of Bio-Environment Control / v.31, no.2, 2022 , pp. 104-113 More about this Journal
Abstract
Plants under the genus Orostachys have been known as medicinal plants. This study deems to determine the growth and leaf color of Orostachys japonica and O. boehmeri when subjected to various LED light sources. A total of seven LED light treatments were used, i.e. red (630 nm), green (520 nm), blue (450 nm), purple (650 and 450 nm), 3000 K white (455, 600 nm), 4100 K white (455, 590 nm), and 6500 K white (450, 545 nm) LEDs. Results showed that O. japonica plants showed favorable growth under 4100 K white LED, while O. boehmeri plants had a positive growth response under white light LEDs (3000, 4100, and 6500 K). In leaf color analysis, the use of green LED showed the greatest change in CIELAB L* and b* values which were relatively higher compared to other treatments indicating that leaves turned yellowish. Further statistical analysis using Pearson's correlation also suggested that there is a small negative association between dry weight and b* values of O. japonica, and a negative moderate association between plant weights (fresh and dry weight) and leaf color (L* and b*) and positive association between said plant weights and a* color values of O. boehmeri. Therefore, it is recommended to cultivate O. japonica under 4100 K white LED and O. boehmeri under 3000, 4100, 6500 K white LEDs.
Keywords
CIELAB; growth evaluation; medicinal plants; plant factory; succulent;
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